File 0015-Disable-multisampled-windows-on-older-drivers.patch of Package libnvidia-egl-wayland2

From 0c15809fcfb3fcf4b2eb2422fdd1dae4f9aea6ae Mon Sep 17 00:00:00 2001
From: Kyle Brenneman <kbrenneman@nvidia.com>
Date: Mon, 10 Nov 2025 14:41:53 -0700
Subject: [PATCH 15/18] Disable multisampled windows on older drivers.

Multisampled windows require additional driver support that was added in
version 0.2 of the platform surface interface.

On older drivers, don't set EGL_WINDOW_BIT on any multisampled
EGLConfigs.
---
 src/wayland/wayland-fbconfig.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/wayland/wayland-fbconfig.c b/src/wayland/wayland-fbconfig.c
index dba3ab1..c115b10 100644
--- a/src/wayland/wayland-fbconfig.c
+++ b/src/wayland/wayland-fbconfig.c
@@ -197,6 +197,22 @@ static EGLBoolean SetupConfig(EplPlatformData *plat,
         config->fourcc = DRM_FORMAT_INVALID;
     }
 
+    if (!EGL_PLATFORM_SURFACE_INTERFACE_CHECK_VERSION(plat->priv->egl.platform_surface_version,
+                EGL_PLATFORM_SURFACE_INTERNAL_SWAP_SINCE))
+    {
+        // Multisampled surfaces require additional driver support which was
+        // added in interface version 0.2.
+        EGLint msaa = 0;
+        if (plat->priv->egl.PlatformGetConfigAttribNVX(internal_display,
+                    config->config, EGL_SAMPLE_BUFFERS, &msaa))
+        {
+            if (msaa != 0)
+            {
+                return EGL_TRUE;
+            }
+        }
+    }
+
     if (config->fourcc == DRM_FORMAT_INVALID)
     {
         // Without a format, we can't do anything with this config.
-- 
2.51.0